2026-06-01T01:22:47Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/586382023-08-27T02:49:39Zcom_20.500.14352_14col_20.500.14352_15

Thermal rho and sigma mesons from chiral symmetry and unitarity Dobado González, Antonio Gómez Nicola, Ángel Llanes Estrada, Felipe José Peláez Sagredo, José Ramón 53 Chiral Perturbation-Theory Finite-Temperature Pion-Scattering One-Loop Mass Física (Física) 22 Física ©2002 The American Physical Society. Work supported by the Spanish CICYT projects, Grant Nos. FPA2000-0956, PB98-0782, and BFM2000-1326. J.R.P. acknowledges support from the CICYT-INFN collaboration, Grant No. 003P 640.15, and E. Oset for useful comments. We study the temperature evolution of the rho and sigma mass and width, using a unitary chiral approach. The one-loop pipi scattering amplitude in chiral perturbation theory at Tnot equal0 is unitarized via the inverse amplitude method. Our results predict a clear increase with T of both the rho and sigma widths. The masses decrease slightly for high T, while the rhopipi coupling increases. The rho behavior seems to be favored by experimental results. In the sigma case, it signals chiral symmetry restoration. Spanish CICYT CICYT-INFN Depto. de Física Teórica Fac. de Ciencias Físicas TRUE pub 2023-06-20T18:47:44Z 2023-06-20T18:47:44Z 2002-11 journal article https://hdl.handle.net/20.500.14352/58638 0556-2813 10.1103/PhysRevC.66.055201 eng FPA2000-0956 PB98-0782 BFM2000-1326 003P 640.15 open access application/pdf Amer Physical Soc